Please tell me which of the following sentences are correct, giving due detail of the construction:
1) write a letter to your brother to send you money you want.
2) write a letter to your brother, requesting him to send you money you want.
Write a letter to your brother, requesting that he send (you) the money that you want.
"Requesting" in this case should be followed by "that", then the person and the verb etc. The "you" in brackets in my sentence isn't required but can be used.